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Determine the molecular formula of an oxide of iron in which the mass percent of iron and oxygen are `69.9` and `30.1`, respectively. |
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Answer» For calculation of empirical formula, Empirical formula mass of `Fe_(2)O_(3)` `=2xx55.85+3xx16.00=159.7 g mol^(-1)` `n=("Molar mass")/("Empirical fomula mass")=159.8/159.7=1` Hemce, molecular formula is same as empirical formula viz., `Fe_(2)O_(3)`. |
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